CFM International claims it is behind a revolution in the use of advanced materials for its Leap series of engines for single-aisle aircraft, that gives it a durability and maintainability edge over the competing Pratt & Whitney PurePower geared turbofan.
Boeing’s confirmation in March that GE Aviation will provide the new GE9X engine to power its proposed 777X development marked the culmination of three years of preliminary work between the engine maker and the airframer in their quest to be in a position to promise a 10 percent reduction in fuel burn compared with the GE90-115B engines on the existing 777-300ER. Also promised is a 5 percent improvement in specific fuel consumption over rival widebody engines by 2020.
Airbus began the 2,500-hour flight-test program for its new A350XWB when the new long-range widebody took off for the first time at almost exactly 10:00 a.m. local time in Toulouse, France, on Friday. The eagerly awaited first flight over southwestern France lasted slightly more than four hours and the twinjet, powered by Rolls-Royce’s Trent XWB engines, safely touched down back in Toulouse at 2:05 p.m.
As Pratt & Whitney Canada (Chalet (A) 330) saw revenues from its business jet engine segment suffer through one of the industry’s steepest downturns in history, the company’s highly diversified product line has allowed it to, as P&WC president John Saabas put it, “ride the wave” of fortune in other sectors and consolidate its leading position in the small engine business.
Airbus’s choice of the Pratt & Whitney Geared Turbofan on the A320neo and Rolls-Royce’s subsequent divesture in engine joint-venture IAE might have signaled to some the beginning of the end of the V2500 turbofan.
Pratt & Whitney CEO David Hess doesn’t spend time lamenting his company’s decision to forgo a bid for a place on Boeing’s proposed 777X. In fact, during a recent interview with AIN at his company’s campus in West Palm Beach, Florida, Hess expressed not an inkling of regret, evidently taking comfort in the narrowbody market’s virtually unequivocal acceptance of his company’s geared turbofan platform. “Our plate’s pretty full right now,” said Hess.
A recent Boeing study predicted a demand for up to 23,000 single-aisle airliners over the next 20 years. For the three engine manufacturers involved in the seven single-aisle aircraft currently in development, the business case for developing all-new engines to power them has been more than justified.
Raisbeck Engineering’s swept-blade “turbofan propellers” for the King Air 200 series are now approved in Brazil after the Brazilian National Civil Aviation Agency (ANAC) granted certification late last month.
A spokesperson for Raisbeck Engineering told AIN, “There are about 500 King Airs in Brazil alone, making it a major market for us. We hope that the swept-blade prop reenergizes our presence in the South American region and we’ll be focusing a lot of our attention on the market as it continues to grow.”
Embry-Riddle Aeronautical University in Prescott, Ariz., will incorporate five turbofan components from previously repaired engines, a donation from Snecma America Engine Services (Sames), into its aerospace and mechanical engineering programs.
The donated items (a fan shaft assembly, thrust bearing, compressor rotor shaft, fuel manifold ring and high-pressure turbine rear shaft) came from a CFM56-5A, the engine that powers single-aisle aircraft such as the Airbus A319 and A320. The components will help expand engineering students’ understanding of turbine engines.
A switch from composite to titanium for the inner walls of the thrust reversers on the Boeing 737 Max has allowed designers to increase the fan diameter in the airplane’s CFM International Leap-1B turbofans without a proportional increase in the size of the nacelle. The relatively minimal growth of the nacelle means Boeing could keep its original plans for coping with the small amount of ground clearance margin available while optimizing thrust levels, explained 737 Max program vice president and general manager Keith Leverkuhn.